try sbt 0.13-M2
try sbt 0.13.0-Beta2
upgrade to sbt 0.13.0-RC1
upgrade to sbt 0.13.0-RC2
upgrade to sbt 0.13.0-RC3
Merge remote-tracking branch 'origin/master' into sbt-0.13

Conflicts:
	project/build.properties
use sbt 0.13 syntax in build
Merge remote-tracking branch 'origin/sbt-0.13' into scala-2.11

Conflicts:
	project/build.properties